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CMOS checksum error — Possible system
board failure or Real Time Clock (RTC) battery
low. Replace the coin-cell battery (see the
Service Manual at support.dell.com/manuals) or
contact Dell (see “Contacting Dell” on page 71).
CPU fan failure — CPU fan has failed. Replace
the CPU fan (see the Service Manual at
support.dell.com/manuals).
Hard-disk drive failure — Possible hard
drive failure during POST. Contact Dell (see
“Contacting Dell” on page 71).
Hard-disk drive read failure — Possible hard
drive failure during HDD boot test. Contact Dell
(see “Contacting Dell” on page 71).
Keyboard failure — Keyboard failure or
loose cable.
To replace the keyboard, see the Service
Manual at support.dell.com/manuals.
No boot device available — No bootable
partition on hard drive, the hard drive cable is
loose, or no bootable device exists.
If the hard drive is your boot device, ensure •
that the cables are connected and that the
drive is installed properly and partitioned as
a boot device.
Enter system setup and ensure that the boot •
sequence information is correct (see the Dell
Technology Guide on your hard drive or at
support.dell.com/manuals).
No timer tick interrupt — A chip on the system
board might be malfunctioning or there might be
a system board failure. See the Service Manual
at support.dell.com/mauals or contact Dell for
assistance (see “Contacting Dell” on page 71).